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Finding the Fourth Proportional to 343.04, 472.57 and 321.98

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Solution

The fourth proportional to 343.04, 472.57 and 321.98 is: 443.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.04 : 472.57 = 321.98 : x
  2. Step 2: Convert to fraction form
    343.04/472.57 = 321.98/x
  3. Step 3: Cross multiply
    343.04x = 472.57 × 321.98
  4. Step 4: Simplify right side
    343.04x = 152,154.92
  5. Step 5: Solve for x
    x = 152,154.92/343.04
  6. Step 6: Final answer
    x = 443.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.